Strip for window sash



Oct. 12, 1937. R. RADFORD ,477

STRIP FOR WINDOW SASH Filed July 24, 1936 R0berZL.Ra/cford,

61 w- A I Patented Oct. 12 1937 UNE-TED, STATES PATENT OFFICE 2,095,477 i STRIP FOR WINDOW sAsn 7 Robert L. Radford, Asheville, N. c. Application July 24, 1936, Serial No. 92,422 11 Claims. (Orzo-52} This invention relates to strips for sliding window sash having the capacity to serve as both a weather-seal and sash positioning means.

Various expedients have heretofore been pro- -'posed to eliminate sash weights and cords in sliding window sash and in some instances to provide such means which also functions after a fashion to provide a weather strip. However, previous attempts to meet this problem have reld quired the use of parts which are more or less expensive or complicated from the standpoint of original installation and subsequent attention, or on the other hand have not provided an eifective weather seal, and, therefore, have not come into l5- general use.

Accordingly, the primary object of the present invention is to provide a novel and practical strip of resilient material which may be readily rolled or formed with dies so as to facilitate quantity 5 production, simplify installation, and which in its general aspect includes a flange adapted to be received in a groove in the sash and a part carrying the flange which is adapted to be attached to the window frame, the latter including a gg bending or flexing aids formed in a line or plane lying at an oblique angle tothe flange.

A further object of the invention is to provide a strip which may be made'in several forms, all of which embody the essential features and char- :zo acteristics of the invention and which may be used in installations where the sash is light or heavy, not only to provide a proper weather seal but also to provide for supporting the sash at the desired position or location in the window 35 frame.

With the above and other objects in view which will more readily appear asthe nature of the invention is better understood; the same consists in the novel construction, combination 40*and arrangements of parts hereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment. of the invention is shown inthe accompanying drawing, in which:-

Figure 1 is a part elevation of a window frame and sliding sash illustrating the application of the invention.

Figure 2 is a plan view of one form of strip em- 50 bodying the invention.

Figure 3 is a cross-sectional view taken on the line 3-3 of Fig. 2.

Figure 4 is a plan view of a modified form of construction utilizing two flanges instead of one 55 as in Fig. 2.

Figure 5 is a vertical cross-section taken on the line 5-5 of Fig. 4.

Figure 6 is a plan View of a further modified form of strip.

Figure 7 is a vertical transverse sectional view 5 taken on the line 11 of Fig. 6.

Figure 8 is a detail sectional view taken on the line" 88 of Fig. 1.

' Similar references designate corresponding parts throughout the several figures of the draw- 10 Referringto the accompanying drawing it will be observed that the window frame is designated generally as F, the same having slidably mounted therein upper and lower sliding sash S and S re spectively. Inasmuch as the present invention eliminates sash weights and sash cords it is possible 'to place the studding or framing F of the building directly against the sides of the window frame F thereby to provide a much tighter construction around the window frame than is possible where weight boxes are used in the usual form of' construction.

The distinctive feature of the invention resides in utilizing the novel form of strip desigedge 4with a body 3 or its equivalent which may conveniently provide the means for attaching the strip to the window frame. In all embodiments the flange l is intended to be parallel to the path of sliding movement'of the sash while the edge 4 of the web or wing 2 opposite the 5 flange is formed at an angle oblique to the flange thereby to provide a bending axis between the web or Wing 2 and the body 3 the distance betweenwhich axis and the flange I progressively decreases toward one end of the strip. The ef- 40 feet of this arrangement is to provide a differential leverage action for the flange which changes progressively throughout the length of the strip. In other words, where the distance between the flange and the edge 4 or bending axis of said flange is widest a longer leverage is provided thereby decreasing the resistance of the flange to pressure. On the other hand as the distance between the flange and the edge 4 decreases the leverage decreases thereby increasing resistance 5 of the'flange to pressure. a Referringnow to Figures 2 and 3 it will be observed that the strip A includes the flange l ofiset from the web or wing 2 which is made integral with the body or base 3, the said wing being folded over the base or body 3 on a fold line which is oblique to the flange and also oblique to the major longitudinal axis of the base 3.

In Figures 4 and 5 there is shown what may be termed a duplex form of strip inasmuch as the same is provided with two flanges l-l and two webs or wings 22 which are connected by a common base 3. In this form of the invention each of the wings 22 is folded over and above the body or base 3 as shown in Fig. 5 and as will be observed from Fig. 4, the line of fold between each wing and the base is on an oblique line. The

effect of thus providing the fold lines in this em..-

bodiment is to provide opposite convergently related bending axes for the wings 2--'-2:' The use.

of two flanges i-i parallel to each other .butin spaced relation is to provide a stronger or what may be termed stiffer unit intended to be used; in.

installations where the sash is relatively heavy.

It will also be observed that the flanges II may to the flange whilethe body or base 3:- is formed outwardly from the wingv or web to provide an attaching base at one side of the strip. As previously indicated however the essential features and characteristics of the invention are preserved in this form of embodiment.

Any of the strips A, A or A may be installed between a window sash and the window frame F. The individual strips are preferably substantially of the same length as the sides of: the window sash so that when the sash are closedv the strips are concealed. The strips are installed with the relatively narrow edge-of the wing or web disposed downwardly. As willbe observed from Figs. 1 and 8 the flangemr flanges I of thestrip are intended tobe received ina groove 5 formed in the side of the window frame and the groove is provided with a roller-6- or other anti-friction element intended to bear edgewise on the flange. In the case of the lower sash the roller or antifriction element 6 is preferably located at the bottom thereof and in the caseof the 'upper sash the said roller or anti-friction element is preferably located at the top. Thus, when the upper sash is completely raised the roller or antifriction element thereof will engage the flange at a point where the-leverage is the greatestor longest, but the web. or flange is. suiflciently strong to sustain the sash in its upper position. When it is desired. to pull the upper sash down the roller will ride onitheflangeand increase the pressure on the flange due to the progressively shortened leverage ofthe'web or wing 2'. With this arrangement it will' be apparent that. the

sash will always be heldinits upper closed position and will not tend todrop down by gravity because of the-increased resistanceroffered to the roller or anti-friction element as the-sash moves.

the sideface of the sash has-a relatively light.

sliding contact with the adjacent face of the resilient web or wing 2 to further increases the weather sealing characteristics.

It will of course be understood that the present novel strip is applied to both sides of the window frame. Figure 1 is merely a'half or partial view of the sash and in actual installation it will be understood that the construction shown in Fig. 1 will be duplicated at the opposite side of the sash.

Where the sash to be controlled is relatively light either of the constructions shown in Figures 2 or 6 including a single flange I may be employed. However, if the sash is relatively large andheavyit is preferable to use the type of strip shownin Fig. 4 where two flanges are provided each carried by its respective resilient wing having,-its;bending-,- axis located in a line oblique to the line or plane of the flanges l|.

Also; in installing the strip the base 3 may be provided with.- suitable openings or holes 3 for receiving-mails or equivalent fastenings to facilitate thezattachment of the strip to the window frame. In the construction of Figures 4 and 5 fastening receiving openings are also provided and as shown in Fig. 5 they are so located as to be accessible through the space provided between the parallel flanges. l- -i. To completely set the fastenings in this construction a nail set or punch may be used.

From the foregoing it will be understood that the distinctive feature of the present invention resides in providing a single strip.- including a body or base and having a resilient wing or web connected thereto on a line oblique to the flange which is offset from the wing at substantially right angles. This arrangement provides a variable leverage for the flange l which is more yieldable or resilient where the distance or space between the flange and bending axis is greatest and on the other hand less flexible or more resistant topressureexerted edgewise on the flange where the distance between the latter and the bending axis is shortest.

Without further description. it is thought that the features and advantages of the invention will be readily apparent to those skilled in the art, and it will of course beunderstood that changes in the form, proportion and minor details of construction may; be resorted to, without departing from: the spirit of the invention and scope of the appended claims. a

1. As anarticle of manufacture, a combined weather strip and positioning means for vertically sliding. window sash comprising a: strip of resilient material including afbase, a resilient wing. overlying the base. and. connected therewith on aline oblique to. the path of vertical movement of. the sash, and. a flange offset from the free edge of the wing, said flange being parallel with the vertical" plane of movement of the sash.

2. As an, article of manufacture, a combined weather strip and positioning means for vertically sliding window sash comprising a single strip of resilient material including a base having an integral resilient wing overlying the same and connected therewith on a line oblique to the pathofverticaf movement of said sash, and a flange offset from the freeedge of said wing, saidflange being parallel with the plane of vertical movement of the sliding sash.

3. As an article of manufacture, a combined weather strip. and sash positioning member including a body having a base and inwardly pro-- jecting side portions overlying and normally spaced from said base, said side portions being x provided with a groove in the side thereof and anti-friction means at the groove comprising a resilient metallic strip having a flange for enter-- ing said groove and engaging said anti-friction means, said strip being adapted to be attached to the window frame with the flange disposed parallel to the plane of the frame and the plane of the sash and having means providing a uniformly progressive variable leverage for the flange throughout its length in response to pressure exerted thereon by said anti-friction means.

5. Combined weather strip and sash positioning means for window frames having sliding sash provided with a groove in the side thereof and anti-friction means located in the groove, comprising a resilient metallic strip substantially coextensive in length with the side frame of the sash, a flange carried by the strip to be slidably received within the groove and to have its outer edge in contact with said anti-frictionimeans, said strip being adapted to be mounted on the window frame with its flange parallel to the plane of the frame and the plane of the sash and having the edge opposite the flange tapering downwardly from top to bottom with respect to the flange to provide uniformly increasing pressure on said flange as thesash descends in the frame and conversely decreasing the pressure as the sash ascends in the frame.

6. In combination with a window frame and .a window sash, a combined weather strip and sash holder interposed between the side edge of the sashand the side of the frame, said strip being formed from sheet material and comprising a base fastened to the side of the frame and a wing spaced outwardly from.- said base and resiliently joined along one edge with said base and constantly exerting outward pressure against the edge of the sash, said wing having a flange disposed in a plane parallel to the plane of the window frame and cooperating with the sash to guide the same for solely straight line movement in a plane parallel to the plane of the window frame between open and closed positions,

the edge of said wing along which the same is joined to the base being disposed at an inclination to said flange so that the wing oifers increasing resistance to movement of the sash in one direction and decreasing resistance to movement of the sash in the opposite direction.

'7. The combination as set forth in claim 6 in which the strip comprises a pair of wings joined to opposite edges of the base, respectively, and having flanges, respectively, which are parallel to each other and both of which cooperate with the sash to guide the same.

8. The combination as set forth in claim 6 in which the sash is provided with a roller having a groove in which is disposed the flange of the wing.

9. The combination as set forth in claim 6 in which the sash is an upper sash and in which the strip is disposed to ofier decreasing resistance to upward closing movement of the sash.

10. The combination as set forth in claim 6 in which the sash is a lower sash and in which the strip is disposed to offer decreasing resistance to upward opening movement of said sash.

11. A combined weather strip and sash holder to: be interposed between the side of a window frame and the side edge of a sash, said strip being formed from sheet material and comprising a base to be fastened to the side of the Window frame and a wing spaced outwardly from the base and resiliently joined along one edge with the base so as constantly to exert outward pressure against the edge of the sash, said wing having a flange to be disposed in a plane parallel to the plane of the window frame and to cooperate with the sash toguide the latter for solely straight line. movement in a plane parallel to the plane of the window frame between fully open and fully closed positions, the edge of said wing along which the wing is joined to the base being disposed at an inclination to said flange to be at an inclination to the plane of the window frame when the strip is operatively interposed between the frame and the sash so that the wing offers increasing resistance to movement of the sash in one direction and decreasing resistance to movement of the sash in the opposite direction.

ROBERT L. RADFORD. 

